If the market-size variance is $650 F, the sales-mix variance is $500 F, the flexible budget variance is $9,000 F, and the static budget variance is $8,000 F, which of the following is TRUE? a. The sales-volume variance is $1,500 U O b. The sales-volume variance is $1,500 U O c. The market-share variance is $18,150 U O d. The market-share variance is $2,150 U e. The sales-quantity variance is $2,150 F